Question

How to get random value from array set an value in array that will be one to selected more than other?

array('00','01','02');

I want to select an random value from this array with most selected value be ’00’, i.e the ’00’ value will be selected 80% and other two values will be 20%.

Here array can have many values, its only an example with three values

Answer 1

$main_array=array('00','01','02');

$priority=array(0,0,0,0,0,0,0,0,1,2);

$rand_index=array_rand($priority);//select a random index from priority array.. $priority[$rand_index] will give you index 0 or 1 or 2 with your priority set..

echo $main_array[$priority[$rand_index]];

I think the code is self explanatory…

Array will have many elements case will come when lets say the requirement will come like 3% probability of “00” 28% prob. of “01” rest to other elements…In that case use array_fill function to fill elements in masses…and array_merge them

Like for the same case I’ve taken answer will be

$main_array=array('00','01','02');
$priority1=array_fill(0,69,2);
$priority2=array_fill(0,28,1);
$priority3=array_fill(0,3,0);    
$priority=array_merge($priority1,$priority2,$priority3);

$rand_index=array_rand($priority);

echo $main_array[$priority[$rand_index]];